Upper Extremity Muscle

Origin: Clavicle, sternum and costal cartilages of ribs 2-6 Insertion: Greater tubercle and lateral lip of Intertubercular sulcus of humerusAction: adducts and medially rotates arm at shoulder joint.

Origin: spines T7-L5, Lumbar vertebrae, crests of sacrum and ilium, ribs 9-12Insertion: intertubercular Sulcus of humerus Action: extends, adducts, and medially rotates arm at shoulder joint.

Origin: acromial extremity of clavicle, acromion of scapula and spine of scapula.Insertion: deltoid tuberosity of humerusAction: moves shoulder

Origin: subscapular fossa of scapulaInsertion: lesser tubercle of humerusAction: medially rotates arm

(Minor) Origin: Inferior Lateral border of scapulaInsertion: greater tubercle of humerusAction: laterally rotates and extends arm (Major) Origin: inferior angle of scapula Insertion: medial lip of intertubercular sulcus of humerusAction: extends arm assists in adduction and medial rotation of arm.

Origin: coracoid process of scapula Insertion: middle of medial surface of shaft of humerusAction: flexes and adducts arm

Origin: long head from tubercle above glenoid of scapula, short head from coracoid process of scapulaInsertion: radial tuberosity of radius and biciptial aponeurosis Action: flexes forearm

Origin: distal, anterior surface of humerusInsertion: ulnar tuberosity and coronoid process of ulnaAction: flexes forearm

Origin: lateral border of distal end of humerusInsertion: superior to styloid process of radiusAction: flexes forearm

Origin: long head from infraglenoid tubercle Insertion: olecranon of ulnaAction: extends forearm and extends arm

Origin: Lateral epicondyle of humerus Insertion: olecranon and superior portion of shaft of ulnaAction: extends forearm

(Teres) Origin: Medial epicondyle of humerus and coronoid process of ulnaInsertion: midlateral surface of radiusAction: pronates forearm at radioulnar joints (Quadratus) Origin: distal portion of shaft of ulna Insertion: distal portion of shaft of radiusAction: pronates forearm at radioulnar joints

(Supra)Origin: supraspinous fossa of scapulaInsertion: greater tubercle of humerusAction: assists deltoid in movement of arm (Infra) Origin: infraspinous fossa of scapula Insertion: greater tubercle of humerusAction: laterral rotates arm

Origin: Lateral epicondyle of humerus and ridge near radial notch of ulnaInsertion: lateral surface of proximal one-third of radiusAction: supinates forearm at radioulnar joints